I am preparing to begin my first organist position at a small Anglican church and am in need of some suggestions for easy to learn, nearly sightreadable repertoire as I am expected to have 4 organ pieces prepared each week in addition to hymns and service music. Time for me is a bit in short supply haha. I've also only recently begun playing organ (about 7 months ago, but have played piano for a long time).

There are a few collections I've been considering. Concordia's The Parish Organist was brought to my attention and I wondered if anyone has experience with these. I've also heard of Dom Paul Benoit's Elevations, but I'm unsure if these will be too advanced for someone with limited practice time (I'm a college student) and organ experience. A few other collections I've glanced at are Herbert Howells' Miniatures for Organ, Healey Willan's Hymn Tune Preludes (which book of these would be best), and a collection by George Thalben Ball called 113 Variations on Hymn Tunes. Does anyone have experience with these or similar collections, and would they be something which would be helpful to build my repertoire?

In addition to Irishtenor's excellent list you might want to invest in some of the works of various French baroque composers. The level of difficulty varies widely - some of the pieces would definitely be a challenge for you whilst other pieces would be rather easy. These pieces were conceived to be played in alternation with verses of chant, so would be quite appropriate for liturgy.

A few of the composers are -Nicolas de GrignyBalbastreLebegueRaisonCorretteTitelouzeCouperinClerambaultand so forth.

You would find the recits particularly relatively easy to play.The most important and challenging aspect of this music would be the ornamentation and the ubiquitous notes inegale in which a series of eighths are played as dotted eighths and sixteenths (or sometimes vice versa). There are other stylistic traits, but these two are paramount. The Basse et dessus de trompettes make particulary festive voluntaries.

Charles Callahan's stuff is easy enough for me. Not saying he's the bestest, but his stuff works.Also, there were reams and reams of harmonium music published in the 19th c. sitting on IMSLP. There as well is Guilmant's Organiste Practique.

Suggesting L'Organiste by Cesar Franck. It is available via IMSLP. The entire collection augmented with some of French and German Baroque collections and early English voluntaries of 1700 and 1800s. All work well with manuals only. (Richard Mix, sorry for more or less duplicating your comment!)

Seconding the Baroque Music for manuals series. I would suggest skimming the orgelbuchlein for the easier pieces. Also Vierne's first 1-12 of the 24 Pieces in Free Style, and Brahms' complete organ works